Miniature gas detection and purification device

ABSTRACT

A miniature gas detection and purification device is disclosed for a user to carry with him, and includes a main body, a purification module, a gas guider and a gas detection module. The gas detection module detects the gas in the environment surrounding the user to obtain a gas detection datum, and controls the gas guider to be operated according to the gas detection datum, so that gas is inhaled into the main body and flows through the purification module for filtration and purification, and the gas purified is finally guided to an area nearby the user.

FIELD OF THE INVENTION

The present disclosure relates to a gas detection and purificationdevice, and more particularly to a miniature gas detection andpurification device for a user to carry with him.

BACKGROUND OF THE INVENTION

Recently, people pay more and more attention to the quality of the airaround their lives. For example, carbon monoxide, carbon dioxide,volatile organic compounds (VOC), PM2.5, nitric oxide, sulfur monoxideand even the suspended particles contained in the air that expose in theenvironment would affect the human health, and even harmful for thehuman life severely. Therefore, the quality of environmental air hasattracted the attention of various countries. Currently, how to detectthe air quality and avoid the harm accompany thereby is a problem thaturgently needs to be solved.

In order to confirm the quality of the air, it is feasible to use a gassensor to detect the air surrounding in the environment. If thedetection information can be provided in real time to warn the peoplestay in the environment, it would be helpful for the people to preventand/or evacuate from the hazard environment immediately and avoid fromaffecting the human health and the harm causing by the hazardous gasexposed in the environment. Therefore, it is a very good application touse a gas sensor to detect the air surrounding in the environment. Thegas purification device is a solution for the air-pollution of modernpeople to prevent inhalation of the hazardous gas. Therefore, how tocombine the gas purification device with a gas detection device so as tofacilitate the user to carry with him for detecting the air quality inreal time, whenever and wherever, and provide the effect of purifyingthe air in an area nearby the user is a main developing subject in thepresent disclosure.

SUMMARY OF THE INVENTION

An object of the present disclosure is to provide a miniature gasdetection and purification device for a user to carry with him. Theminiature gas detection and purification device includes a main body, apurification module, a gas guider and a gas detection module. The gasdetection module detects gas in an environment surrounding the user toobtain a gas detection datum for actuating the gas guider. Thereby, thegas of environment surrounding the user is introduced into the main bodyand flows through the purification module for filtration andpurification, and eventually achieves the effect of exporting thepurified gas to an area nearby the user.

In accordance with an aspect of the present disclosure, a gas detectionand purification device including a main body, a purification module, agas guider and a gas detection module is provided. The main bodyincludes at least one inlet, at least one outlet, a detecting inlet, adetecting outlet and a gas-flow channel. The gas-flow channel isdisposed between the at least one inlet and the at least one outlet. Thepurification module is disposed in the gas-flow channel of the mainbody. The gas guider is disposed in the gas-flow channel of the mainbody and located at a side of the purification module. Gas is inhaledthrough the at least one inlet, flows through the purification modulefor filtration and purification, and is discharged out through the atleast one outlet. The gas detection module is disposed in the main body,spatially corresponding to the detecting inlet and the detecting outletfor detecting the gas to obtain a gas detection datum, and includes agas detection main part, a microprocessor and a communicator. The gasdetection main part detects the gas introduced from the outside of themain body to obtain the gas detection datum, the microprocessor receivesthe gas detection datum to calculate, process and control the enablementand disablement of the gas guider, and the communicator receives the gasdetection datum from the microprocessor. The microprocessor enable thegas guider according to the gas detection datum detected by the gasdetection module, so that the gas is inhaled through the detecting inletand flows through the purification module for filtration andpurification, and the purified gas is guided to an area nearby the user.

The above contents of the present disclosure will become more readilyapparent to those ordinarily skilled in the art after reviewing thefollowing detailed description and accompanying drawings, in which:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic exterior view illustrating a miniature gasdetection and purification device according to the embodiment of thepresent disclosure;

FIG. 2A is a schematic cross-sectional view illustrating a purificationmodule of the miniature gas detection and purification device accordingto a first embodiment of the present disclosure;

FIG. 2B is a schematic cross-sectional view illustrating a purificationmodule of the miniature gas detection and purification device accordingto a second embodiment of the present disclosure;

FIG. 2C is a schematic cross-sectional view illustrating a purificationmodule of the miniature gas detection and purification device accordingto a third embodiment of the present disclosure;

FIG. 2D is a schematic cross-sectional view illustrating a 4purificationmodule of the miniature gas detection and purification device accordingto a fourth embodiment of the present disclosure;

FIG. 2E is a schematic cross-sectional view illustrating a purificationmodule of the miniature gas detection and purification device accordingto a fifth embodiment of the present disclosure;

FIG. 3A is a schematic exploded view illustrating the related componentsof the actuating pump of the miniature gas detection and purificationdevice according to the embodiment of the present disclosure from afront perspective;

FIG. 3B is a schematic exploded view illustrating the related componentsof the actuating pump of the miniature gas detection and purificationdevice according to the embodiment of the present disclosure from a rearperspective;

FIG. 4A is a schematic cross-sectional view illustrating the actuatingpump of the miniature gas detection and purification device according toan embodiment of the present disclosure;

FIG. 4B is a schematic cross-sectional view illustrating the actuatingpump of the miniature gas detection and purification device according toanother embodiment of the present disclosure;

FIGS. 4C to 4E schematically illustrate the actions of the actuatingpump of FIG. 4A;

FIG. 5A is a schematic exterior view illustrating a gas detection mainpart according to an embodiment of the present disclosure;

FIG. 5B is a schematic exterior view illustrating the gas detection mainpart according to the embodiment of the present disclosure from anotherperspective angle;

FIG. 5C is a schematic exploded view illustrating the gas detection mainpart of the present disclosure;

FIG. 5D is a schematic perspective view illustrating the relevantcomponents of the gas detection module of the present disclosure;

FIG. 6A is a schematic perspective view illustrating a base of the gasdetection main part of the present disclosure;

FIG. 6B is a schematic perspective view illustrating the base of the gasdetection main part of the present disclosure from another perspectiveangle;

FIG. 7 is a schematic perspective view illustrating a laser componentand a particulate sensor accommodated in the base of the presentdisclosure;

FIG. 8A is a schematic exploded view illustrating the combination of thepiezoelectric actuator and the base according to the present disclosure;

FIG. 8B is a schematic perspective view illustrating the combination ofthe piezoelectric actuator and the base according to the presentdisclosure;

FIG. 9A is a schematic exploded view illustrating the piezoelectricactuator of the present disclosure;

FIG. 9B is a schematic exploded view illustrating the piezoelectricactuator of the present disclosure from another perspective angle;

FIG. 10A is a schematic cross-sectional view illustrating thepiezoelectric actuator accommodated in the gas-guiding-component loadingregion according to the present disclosure;

FIGS. 10B and 10C schematically illustrate the actions of thepiezoelectric actuator of FIG. 10A;

FIGS. 11A to 11C schematically illustrate gas flowing paths of the gasdetection main part of the present disclosure;

FIG. 12 schematically illustrates a light beam path emitted from thelaser component of the gas detection main body of the presentdisclosure; and

FIG. 13 a block diagram illustrating a configuration of a controlcircuit unit and the related components of the miniature gas detectionand purification device according to an embodiment of the presentdisclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The present disclosure will now be described more specifically withreference to the following embodiments. It is to be noted that thefollowing descriptions of preferred embodiments of this invention arepresented herein for purpose of illustration and description only. It isnot intended to be exhaustive or to be limited to the precise formdisclosed.

Please refer to FIG. 1 and FIG. 2A. The present disclosure provides aminiature gas detection and purification device for a user to carry withhim including a main body 1, a purification module 2, a gas guider 3 anda gas detection module 4. Therefore, in the overall structure design ofthe miniature gas detection and purification device of the presentdisclosure provides will consider whether the volume is suitable forholding by hand or portability. The length L, width W, height H andweight of the main body 1 of the miniature gas detection andpurification device would be considered in the design thereof.Preferably but not exclusively, in the embodiment, the main body 1 hasthe length L ranged from 75 mm to 110 mm, the width W ranged from 50 mmto 70 mm, and the height H ranged from 18 mm to 32 mm. Moreover, themain body 1 has the weight ranged from 150 g to 300 g. Preferably butnot exclusively, in an embodiment, the main body 1 has the length Lranged from 85 mm to 95 mm, the width W ranged from 55 mm to 65 mm, andthe height H ranged from 21 mm to 29 mm. Moreover, the main body 1 hasthe weight ranged from 100 g to 200 g. Preferably but not exclusive, inanother embodiment, the main body 1 has the length L of 90 mm, the widthW of 60 mm and the height H of 25 mm. Moreover, the main body 1 has theweight less than 300 g. The overall arrangement of the miniature gasdetection and purification device is most suitable for the user to carrywith him.

Please refer to FIG. 1 and FIG. 2A. In the embodiment, the main body 1includes at least one inlet 11, at least one outlet 12 and a gas-flowchannel 13. The gas-flow channel 13 is disposed between the at least oneinlet 11 and the at least one outlet 12. In the embodiment, the mainbody 1 further includes a detecting inlet 14, a detecting outlet 15 anda buckle 16. The buckle 16 is buckled with a hanging belt (not shown) tobe buckled and allows the main body 1 to be wore on the user to carrywith him.

Please refer to FIG. 2A. In the embodiment, the purification module 2 isdisposed in the gas-flow channel 13 for filtering gas introduced throughthe gas-flow channel 13. The gas guider 3 is disposed in the gas-flowchannel 13 and located at a side of the purification module 2. The gasis inhaled through the at least one inlet 11, flows through thepurification module 2 for filtration and purification, and is dischargedout through the at least one outlet 12.

Please refer to FIGS. 2A to 2E. The above-mentioned purification module2 is disposed in the gas-flow channel 13 and capable of beingimplemented in various embodiments. Preferably but not exclusively, asshown in FIG. 2A, the purification module 2 is a filter unit, whichincludes a filter screen 2 a. In the embodiment, the gas is introducedinto the gas-flow channel 13 by the gas guider 3, and is filteredthrough the filter screen 2 a by adsorbing the chemical smoke, bacteria,dust particles and pollen contained in the gas, so as to achieve theeffects of filtration and purification of the introduced air. Preferablybut not exclusively, the filter screen 2 a is one selected from thegroup consisting of an electrostatic filter screen, an activated carbonfilter screen and a high efficiency particulate air (HEPA) filterscreen. Furthermore, in an embodiment, the filter screen 2 a is coatedwith a cleansing factor containing chlorine dioxide to inhibit virusesand bacteria in the gas. The inhibition rates for Influenza A virus,Influenza B virus, Enterovirus and Norovirus are more than 99%, which ishelpful for reducing cross-infection of viruses. In another embodiment,the filter screen 2 a is coated with a herbal protective layer extractedfrom ginkgo and Japanese rhus chinensis to form a herbal protectiveanti-allergic filter, that can effectively resist allergen and destroythe surface protein of influenza virus (for example: H1N1 influenzavirus) passing through the filter. In other embodiments, the filterscreen 2 a is coated with a silver ion to inhibit viruses and bacteriain the gas.

Preferably but not exclusively, as shown in FIG. 2B, the purificationmodule 2 is a photo-catalyst unit including a photo-catalyst 2 b and anultraviolet lamp 2 c disposed in the gas-flow channel 13, and spacedapart from each other at a distance. In the embodiment, the gas isintroduced into the gas-flow channel 13 by the gas guider 3, and thephoto-catalyst 2 b is irradiated with the ultraviolet lamp 2c to convertlight energy into chemical energy of a chemical reaction to dispose anddisinfect harmful gases and inactive bacteria contained in the gas, sothat the gas introduced can be purified, and achieve the effects offiltration and purification of air. In an embodiment, the purificationmodule 2 is a photo-catalyst unit combined with the filter screen 2 a asshown in FIG. 2A, which are disposed in the gas-flow channel 13 toenhance the effects of filtration and purification. Preferably but notexclusively, the filter screen 2 a is one selected from the groupconsisting of an electrostatic filter screen, an activated carbon filterscreen and a high efficiency particulate air (HEPA) filter screen.

Preferably but not exclusively, as shown in FIG. 2C, the purificationmodule 2 is a photo-plasma unit including a nanometer irradiation tube 2d disposed within the gas-flow channel 13. When the gas is introducedinto the gas-flow channel 13 by the gas guider 3, the gas is irradiatedby the nanometer irradiation tube 2 d, and oxygen molecules and watermolecules contained in the gas are decomposed into high oxidizingphoto-plasma, which is ionic air flow capable of destroying organicmolecules. As a result, volatile formaldehyde, volatile toluene andvolatile organic (VOC) gases contained in the gas are decomposed intowater and carbon dioxide, so as to achieve the effects of filtration andpurification. In an embodiment, the purification module 2 of aphoto-plasma unit can be combined with the filter screen 2 a as shown inFIG. 2A, which are disposed in the gas-flow channel 13 together toenhance the effects of filtration and purification of air. Preferablybut not exclusively, the filter screen 2 a is one selected from thegroup consisting of an electrostatic filter screen, an activated carbonfilter screen and a high efficiency particulate air (HEPA) filterscreen.

Preferably but not exclusively, as shown in FIG. 2D, the purificationmodule 2 is a negative ionizer including at least one electrode wire 2e, at least one dust collecting plate 2 f and a boost power supplydevice 2 g. Each electrode wire 2 e and each dust collecting plate 2 fare disposed within the gas-flow channel 13. When a high voltage isprovided from the boost power supply device 2 g to the at least oneelectrode wire 2 e to discharge, the dust collecting plate 2 f hasnegative charge. When the gas is introduced into the gas-flow channel 13by the gas guider 3, each electrode wire 2 e discharges to make fineparticles in the gas to have positive charge, and then the fineparticles having positive charge are attached to the negatively chargeddust collecting plate 2 f, so as to achieve the effects of filtrationand purification. In an embodiment, the purification module 2 of anegative ionizer can be combined with the filter screen 2 a as shown inFIG. 2A, which are disposed in the gas-flow channel 13, to enhance theeffects of filtration and purification of air. Preferably but notexclusively, the filter screen 2 a is one selected from the groupconsisting of an electrostatic filter screen, an activated carbon filterscreen and a high efficiency particulate air (HEPA) filter screen.

Preferably but not exclusively, as shown in FIG. 2E, the purificationmodule 2 is a plasma ion unit including an upper electric-fieldprotection screen 2 h, a high efficiency particulate air filter screen 2i, a high-voltage discharge electrode 2 j, a lower electric-fieldprotection screen 2 k and a boost power supply device 2 g. The upperelectric-field protection screen 2 h, the high efficiency particulateair filter screen 2 i, the high-voltage discharge electrode 2 j and thelower electric-field protection screen 2 k are disposed within thegas-flow channel 13. The high efficiency particulate air filter screen 2i and the high-voltage discharge electrode 2 j are located between theupper electric-field protection screen 2 h and the lower electric-fieldprotection screen 2 k. When a high voltage is provided from the boostpower supply device 2 g to the high-voltage discharge electrode 2 j todischarge, a high-voltage plasma column with plasma ion is formed. Whenthe gas is introduced into the gas-guiding channel 13 by the gas guider3, oxygen molecules and water molecules contained in the gas aredecomposed into positive hydrogen ions (H⁺) and negative oxygen ions(O₂) by the plasma ion. As the positive hydrogen ions (H⁺) and negativeoxygen (O₂) ions surrounding substances are absorbed with water attachedon the surface of viruses and bacteria and converted into OH radicals,it would turn into Reactive oxygen species (ROS) with extremely strongoxidizing power under chemical reaction, and take away the hydrogen (H)from the protein on the surface of viruses and/or bacteria, thusdecomposing the protein and suppressing their activity, so as to achievethe effects of filtration and purification of introduced air. In anembodiment, the purification module 2 of a plasma ion unit can becombined with the filter screen 2 a as shown in FIG. 2A, which aredisposed in the gas-flowing channel 13 to enhance the effects offiltration and purification of air. Preferably but not exclusively, thefilter screen 2 a is one selected from the group consisting of anelectrostatic filter screen, an activated carbon filter screen and ahigh efficiency particulate air (HEPA) filter screen.

In the embodiment, preferably but not exclusively, the gas guider 3 is afan, such as a vortex fan or a centrifugal fan. Alternatively, the gasguider 3 is an actuating pump 30, as shown in FIGS. 3A, 3B, 4A and 4B.In the embodiment, the actuating pump 30 includes a gas inlet plate 301,a resonance plate 302, a piezoelectric actuator 303, a first insulationplate 304, a conducting plate 305 and a second insulation plate 306,which are stacked on each other sequentially. In the embodiment, the gasinlet plate 301 includes at least one inlet aperture 301 a, at least oneconvergence channel 301 b and a convergence chamber 301 c. The at leastone gas inlet aperture 301 a is disposed to inhale the gas. The at leastone gas inlet aperture 301 a correspondingly penetrates through the gasinlet plate 301 into the at least one convergence channel 301 b, and theat least one convergence channel 301 b is converged into the convergencechamber 301 c. Therefore, the gas inhaled through the at least one gasinlet aperture 301 a is converged into the convergence chamber 301 c.The number of the gas inlet apertures 301 a is the same as the number ofthe convergence channels 301 b. In the embodiment, the number of the gasinlet apertures 301 a and the convergence channels 301 b is exemplifiedby four, but not limited thereto. The four gas inlet apertures 301 apenetrate through the gas inlet plate 301 into the four convergencechannels 301 b respectively, and the four convergence channels 301 bconverge to the convergence chamber 301 c.

Please refer to FIGS. 3A, 3B and 4A. The resonance plate 302 is attachedon the gas inlet plate 301. The resonance plate 302 has a centralaperture 302 a, a movable part 302 b and a fixed part 302 c. The centralaperture 302 a is located at a center of the resonance plate 302 and iscorresponding to the convergence chamber 301 c of the gas inlet plate301. The movable part 302 b surrounds the central aperture 302 a and iscorresponding to the convergence chamber 301 c. The fixed part 302 c isdisposed around the periphery of the resonance plate 302 and securelyattached on the gas inlet plate 301.

Please refer to FIGS. 3A, 3B and 4A, again. The piezoelectric actuator303 includes a suspension plate 303 a, an outer frame 303 b, at leastone bracket 303 c, a piezoelectric element 303 d, at least one clearance303 e and a bulge 303E The suspension plate 303 a is square-shapedbecause the square suspension plate 303 a is more power-saving than thecircular suspension plate. Generally, the consumed power of thecapacitive load operated at the resonance frequency would induce as theresonance frequency raised. Since the resonance frequency of the squaresuspension plate 303 a is obviously lower than that of the circularsquare suspension plate, the consumed power of the square suspensionplate 303 a would be fewer. Therefore, the square suspension plate 303 ain the embodiment has the advantage of power-saving. In the embodiment,the outer frame 303 b is disposed around the periphery of the suspensionplate 303 a, and at least one bracket 303 c is connected between thesuspension plate 303 a and the outer frame 303 b so as to provide anelastic support for the suspension plate 303 a. The piezoelectricelement 303 d has a side, and the length of the side of thepiezoelectric element 303 d is less than or equal to that of thesuspension plate 303 a. The piezoelectric element 303 d is attached on asurface of the suspension plate 303 a. When a voltage is applied to thepiezoelectric element 303 d, the suspension plate 303 a is driven toundergo the bending vibration. The at least one clearance 303 e isformed between the suspension plate 303 a, the outer frame 303 b and theat least one bracket 303 c for allowing the gas to flow through. Thebulge 303 f is formed on a surface of the suspension plate 303 aopposite to the surface of the suspension plate 303 a attached on thepiezoelectric element 303 d. In the embodiment, the bulge 303 f isformed by using an etching process on the suspension plate 303 a.Accordingly, the bulge 303 f of the suspension plate 303 a is integrallyformed and protrudes from the surface opposite to that attached with thepiezoelectric element 303 d, and formed a convex structure.

Please refer to FIGS. 3A, 3B and 4A. In the embodiment, the gas inletplate 301, the resonance plate 302, the piezoelectric actuator 303, thefirst insulation plate 304, the conducting plate 305 and the secondinsulation plate 306 are stacked and assembled sequentially. A chamberspace 307 is formed between the suspension plate 303 a and the resonanceplate 302, and the chamber space 307 can be formed by filling a gapbetween the resonance plate 302 and the outer frame 303 b of thepiezoelectric actuator 303 with a material, such as a conductiveadhesive, but not limited thereto. Thus, a specific depth between theresonance plate 302 and the suspension plate 303 a is maintained toguide the gas to pass rapidly. In addition, since the resonance plate302 and the suspension plate 303 a are maintained at a suitabledistance, the contact interference resulted therebetween and the noisegenerated thereby can be largely reduced. In other embodiments, thethickness of the conductive adhesive filled into the gap between theresonance plate 302 and the outer frame 303 b of the piezoelectricactuator 303 can be reduced by increasing the height of the outer frame303 b of the piezoelectric actuator 303. Therefore, the entireassembling structure of actuating pump 30 would not indirectlyinfluenced by the hot pressing temperature and the cooling temperature,and avoiding the actual distance between the suspension plate 303 a andthe resonance plate 302 of the chamber space 307 being affected by thethermal expansion and contraction of the filling material of theconductive adhesive, but is not limited thereto. In addition, since thetransportation effect of the actuating pump 30 is affected by thechamber space 307, it is very important to maintain a constant chamberspace 307, so as to provide a stable transportation efficiency of theactuating pump 30.

Please refer to FIG. 4B, in some other embodiments of the piezoelectricactuator 303, the suspension plate 303 a is formed by stamping to makeit extend at a distance in a direction away from the resonance plates302. The extended distance can be adjusted through the at least onebracket 303 c formed between the suspension plate 303 a and the outerframe 303 b. Consequently, the surface of the bulge 303 f disposed onthe suspension plate 303 a and the surface of the outer frame 303 b arenon-coplanar. The piezoelectric actuator 303 is attached to the fixedpart 302 c of the resonance plate 302 by hot pressing a small amount offilling materials, such as a conductive adhesive, applied to thecoupling surface of the outer frame 303 b, thereby assembling thepiezoelectric actuator 303 and the resonance plates 302 in combination.Therefore, the structure improvement of the chamber space 307 is formedby directly stamping the suspension plate 303 a of the piezoelectricactuator 303 as described above, and the required modification of thechamber space 307 can be achieved by adjusting the stamping distance ofthe suspension plate 303 a of the piezoelectric actuator 303. This caneffectively simplify the structural design of the chamber space 307, andalso achieves the advantages of simplifying the process and shorteningthe processing time. In addition, the first insulating plate 304, theconducting plate 305 and the second insulating plate 306 are all thinframe-shaped sheets, but are not limited thereto, and are sequentiallystacked on the piezoelectric actuator 303 to form the entire structureof actuating pump 30.

In order to understand the actuations of the actuating pump 30, pleaserefer to FIGS. 4C to 4E. Please refer to FIG. 4C first, when thepiezoelectric element 303 d of the piezoelectric actuator 303 isdeformed in response to an applied voltage, the suspension plate 303 ais driven to displace in the direction away from the resonance plate302. In that, the volume of the chamber space 307 is increased, anegative pressure is formed in the chamber space 307, and the gas in theconvergence chamber 301 c is introduced into the chamber space 307. Atthe same time, the resonance plate 302 is in resonance and is thusdisplaced synchronously, and thereby increased the volume of theconvergence chamber 301 c. Since the gas in the convergence chamber 301c is introduced into the chamber space 307, the convergence chamber 301c is also result in a negative pressure state, and the gas is inhaledinto the convergence chamber 301 c through the gas inlet apertures 301 aand the convergence channels 301 b. Then, as shown in FIG. 4D, thepiezoelectric element 303 d drives the suspension plate 303 a todisplace toward the resonance plate 302 to compress the chamber space307. Similarly, the resonance plate 302 is actuated and displaced awayfrom the suspension plate 303 a in resonance to the suspension plate 303a, and compress the air in the chamber space 307. Thus, the gas in thechamber space 307 is further transmitted downwardly to pass through theclearances 303 e and achieves the effect of gas transportation. Finally,as shown in FIG. 4E, when the suspension plate 303 a resiliently moveback to an initial state, the resonance plate 302 displaces toward thesuspension plate 303 a due to its inertia momentum, and keep on pushesthe gas in the chamber space 307 toward the clearances 303 e, and thevolume of the convergence chamber 301 c is increased at the same time.Thus, the gas outside can be continuously inhaled and passed through thegas inlet apertures 301 a and the convergence channels 301 b, andconverged in the convergence chamber 301 c. By repeating the actuationsillustrated in FIGS. 4C to 4E continuously, the actuating pump 30 cancontinuously transport the gas at high speed. The gas enters the gasinlet apertures 301 a, flows through a flow path formed by the gas inletplate 301 and the resonance plate 3022 and result in a pressuregradient, and then transported through the clearances 303 e, so as toachieve the operation of gas transporting of the actuating pump 30.

Please refer to FIG. 2A, FIG. 5D and FIG. 13. In the embodiment, the gasdetection module is disposed in the main body 1, and spatiallycorresponding to the detecting inlet 14 and the detecting outlet 15 fordetecting the gas surrounding in the environment of the user to obtain agas detection datum. In the embodiment, the gas detection module 4includes a control circuit board 4 a, a gas detection main part 4 b, amicroprocessor 4 c, a communicator 4 d and a power supply unit 4 e. Inthe embodiment, the power supply unit 4 e provides an operating power tothe gas detection main part 4 b, so that the gas detection main part 4 bis allowed to detect the gas introduced from the outside of the mainbody 1 to obtain the gas detection datum. Preferably but notexclusively, the power supply unit 4 e is externally electricallyconnected to a power supply device 5 charged through wired communicationtransmission or wireless communication transmission. In the embodiment,the microprocessor 4 c receives the gas detection datum to calculate,process and control an enablement and a disablement of the gas guider 3for purifying the gas, and the communicator 4 d receives the gasdetection datum from the microprocessor 4 c and externally transmits thegas detection datum to an external device 6, so as to allow the externaldevice 6 to obtain an information and an alarm indication in regard tothe gas detection datum. Preferably but not exclusively, the he externaldevice 6 is a mobile device or a cloud processing device.

Please refer to FIGS. 5A to 5C, FIGS. 6A to 6B, FIG. 7 and FIGS. 8A to8B. In the embodiment, the gas detection main part 4 b includes a base41, a piezoelectric actuator 42, a driving circuit board 43, a lasercomponent 44, a particulate sensor 45 and an outer cover 46. The base 41includes a first surface 411, a second surface 412, a laser loadingregion 413, a gas-inlet groove 414, a gas-guiding-component loadingregion 415 and a gas-outlet groove 416. In the embodiment, the firstsurface 411 and the second surface 412 are two surfaces opposite to eachother. In the embodiment, the laser loading region 413 is hollowed outfrom the first surface 411 to the second surface 412. The gas-inletgroove 414 is recessed from the second surface 412 and disposed adjacentto the laser loading region 413. The gas-inlet groove 414 includes agas-inlet 414 a and two lateral walls. The gas-inlet 414 a is in fluidcommunication with an environment outside the base 41, and spatiallycorresponding to an inlet opening 461 a of the outer cover 46. Atransparent window 414 b is opened on the two lateral walls and is influid communication with the laser loading region 413. Therefore, thefirst surface 411 of the base 41 is covered and attached by the outercover 46, and the second surface 412 is covered and attached by thedriving circuit board 43. Thus, the gas-inlet groove 414 defines agas-inlet path, as shown in FIG. 7 and FIG. 11A.

Please refer to FIGS. 6B and 6C. In the embodiment, thegas-guiding-component loading region 415 is recessed from the secondsurface 412 and in fluid communication with the gas-inlet groove 414. Aventilation hole 415 a penetrates a bottom surface of thegas-guiding-component loading region 415. In the embodiment, thegas-outlet groove 416 includes a gas-outlet 416 a, and the gas-outlet416 a is spatially corresponding to the outlet opening 461 b of theouter cover 46. The gas-outlet groove 416 includes a first section 416 band a second section 416 c. The first section 416 b hollowed out fromthe first surface 411 is spatially corresponding to a verticalprojection area of the gas-guiding-component loading region 415. Thesecond section 416 c is hollowed out from the first surface 411 to thesecond surface 412 in a region where the first surface 411 is notaligned with the vertical projection area of the gas-guiding-componentloading region 415. The first section 416 b and the second section 416 care connected to form a stepped structure. Moreover, the first section416 b of the gas-outlet groove 416 is in fluid communication with theventilation hole 415 a of the gas-guiding-component loading region 415,and the second section 416 c of the gas-outlet groove 416 is in fluidcommunication with the gas-outlet 416 a. In that, when the first surface411 of the base 41 is attached and covered by the outer cover 46, andthe second surface 412 of the base 41 is attached and covered by thedriving circuit board 43, the gas-outlet groove 416 defines a gas-outletpath, as shown in FIGS. 7 and 11C.

Please refer to FIG. 5C and FIG. 7. In the embodiment, the lasercomponent 44 and the particulate sensor 45 are disposed on the drivingcircuit board 43 and accommodated in the base 41. In order to describethe positions of the laser component 44 and the particulate sensor 45 inthe base 41, the driving circuit board 43 is omitted in FIG. 7 forclarity. Please refer to FIG. 5C, FIG. 6B, FIG. 7 and FIG. 12. In theembodiment, the laser component 44 is accommodated in the laser loadingregion 413 of the base 41, and the particulate sensor 45 is accommodatedin the gas-inlet groove 414 of the base 41 and aligned to the lasercomponent 44. In addition, the laser component 44 is spatiallycorresponding to the transparent window 414 b, a light beam emitted bythe laser component 44 passes through the transparent window 414 b andis irradiated into the gas-inlet groove 414. A light beam path emittedfrom the laser component 44 passes through the transparent window 414 band extends in a direction perpendicular to the gas-inlet groove 414. Inthe embodiment, a projecting light beam emitted from the laser component44 passes through the transparent window 414 b and enters the gas-inletgroove 414, and suspended particles contained in the gas passing throughthe gas-inlet groove 414 is irradiated by the projecting light beam.When the suspended particles contained in the gas are irradiated togenerate scattered light spots, the scattered light spots are detectedand calculated by the particulate sensor 45 for obtaining relatedinformation in regard to the sizes and the concentration of thesuspended particles contained in the gas. The suspended particlescontained in the gas includes bacteria and viruses. In the embodiment,the particulate sensor 45 is a PM2.5 sensor.

Please refer to FIG. 8A and FIG. 8B. The piezoelectric actuator 42 isaccommodated in the gas-guiding-component loading region 415 of the base41. Preferably but not exclusively, the gas-guiding-component loadingregion 415 is square and includes a plurality of positioning protrusions415 b disposed at the corners of the gas-guiding-component loadingregion 415, respectively. The piezoelectric actuator 42 is disposed inthe gas-guiding-component loading region 415 through the fourpositioning protrusions 415 b. In addition, as shown in FIGS. 6A, 6B,11B and 11C, the gas-guiding-component loading region 415 is in fluidcommunication with the gas-inlet groove 414. When the piezoelectricactuator 42 is enabled, the gas in the gas-inlet groove 414 is inhaledby the piezoelectric actuator 42, so that the gas flows into thepiezoelectric actuator 42. Thereafter, the gas is transported into thegas-outlet groove 416 through the ventilation hole 415 a of thegas-guiding-component loading region 415.

Please refer to FIGS. 5B and 5C. In the embodiment, the driving circuitboard 43 covers and is attached to the second surface 412 of the base41, and the laser component 44 is positioned and disposed on the drivingcircuit board 43, and is electrically connected to the driving circuitboard 43. The particulate sensor 45 is positioned and disposed on thedriving circuit board 43, and is electrically connected to the drivingcircuit board 43. Preferably but not exclusively, the particulate sensor25 is disposed at a position where the gas-inlet groove 214perpendicularly intersects with the light beam path of the lasercomponent 24. The outer cover 46 covers the base 41 and is attached tothe first surface 411 of the base 41. Moreover, the outer cover 46includes a side plate 461. The side plate 461 has an inlet opening 461 aand an outlet opening 461 b. When the outer cover 46 covers the base 41,the inlet opening 461 a is spatially corresponding to the gas-inlet 414a of the base 41 (as shown in FIG. 11A), and the outlet opening 461 b isspatially corresponding to the gas-outlet 416 a of the base 41 (as shownin FIG. 11C).

Please refer to FIGS. 9A and 9B. In the embodiment, the piezoelectricactuator 42 includes a gas-injection plate 421, a chamber frame 422, anactuator element 423, an insulation frame 424 and a conductive frame425. In the embodiment, the gas-injection plate 421 is made by aflexible material and includes a suspension plate 4210 and a hollowaperture 4211. The suspension plate 4210 is a sheet structure andpermitted to undergo a bending deformation. Preferably but notexclusively, the shape and the size of the suspension plate 4210 arecorresponding to an inner edge of the gas-guiding-component loadingregion 415. The shape of the suspension plate 4210 is one selected fromthe group consisting of a square, a circle, an ellipse, a triangle and apolygon. The hollow aperture 4211 passes through a center of thesuspension plate 4210, so as to allow the gas to flow through.

In the embodiment, the chamber frame 422 is carried and stacked on thegas-injection plate 421. In addition, the shape of the chamber frame 422is corresponding to the gas-injection plate 421. The actuator element423 is carried and stacked on the chamber frame 422. A resonance chamber426 is collaboratively defined by the actuator element 423, the chamberframe 422 and the suspension plate 4210 and formed between the actuatorelement 423, the chamber frame 422 and the suspension plate 4210. Theinsulation frame 424 is carried and stacked on the actuator element 423and the appearance of the insulation frame 424 is similar to that of thechamber frame 422. The conductive frame 425 is carried and stacked onthe insulation frame 424, and the appearance of the conductive frame 425is similar to that of the insulation frame 424. In addition, theconductive frame 425 includes a conducting pin 4251 and a conductingelectrode 4252. The conducting pin 4251 is extended outwardly from anouter edge of the conductive frame 425, and the conducting electrode4252 is extended inwardly from an inner edge of the conductive frame425. Moreover, the actuator element 423 further includes a piezoelectriccarrying plate 4231, an adjusting resonance plate 4232 and apiezoelectric plate 4233. The piezoelectric carrying plate 4231 iscarried and stacked on the chamber frame 422. The adjusting resonanceplate 4232 is carried and stacked on the piezoelectric carrying plate4231. The piezoelectric plate 4233 is carried and stacked on theadjusting resonance plate 4232. The adjusting resonance plate 4232 andthe piezoelectric plate 4233 are accommodated in the insulation frame424. The conducting electrode 4252 of the conductive frame 425 iselectrically connected to the piezoelectric plate 4233. In theembodiment, the piezoelectric carrying plate 4231 and the adjustingresonance plate 4232 are made by a conductive material. Thepiezoelectric carrying plate 4231 includes a piezoelectric pin 4234. Thepiezoelectric pin 4234 and the conducting pin 4251 are electricallyconnected to a driving circuit (not shown) of the driving circuit board43, so as to receive a driving signal, such as a driving frequency and adriving voltage. In that, an electric circuit for the driving signal isformed by the piezoelectric pin 4234, the piezoelectric carrying plate4231, the adjusting resonance plate 4232, the piezoelectric plate 4233,the conducting electrode 4252, the conductive frame 425 and theconducting pin 4251. Moreover, the insulation frame 424 is insulatedbetween the conductive frame 425 and the actuator element 423, so as toavoid the occurrence of a short circuit. Thereby, the driving signal istransmitted to the piezoelectric plate 4233. After receiving the drivingsignal such as the driving frequency and the driving voltage, thepiezoelectric plate 4233 deforms due to the piezoelectric effect, andthe piezoelectric carrying plate 4231 and the adjusting resonance plate4232 are further driven to generate the bending deformation in thereciprocating manner.

As described above, the adjusting resonance plate 4232 is locatedbetween the piezoelectric plate 4233 and the piezoelectric carryingplate 4231 and served as a buffer between the piezoelectric plate 4233and the piezoelectric carrying plate 4231. Thereby, the vibrationfrequency of the piezoelectric carrying plate 4231 is adjustable.Basically, the thickness of the adjusting resonance plate 4232 isgreater than the thickness of the piezoelectric carrying plate 4231, andthe thickness of the adjusting resonance plate 4232 is adjustable,thereby adjusting the vibration frequency of the actuator element 423.

Please refer to FIG. 9A, FIG. 9B and FIG. 10A. In the embodiment, thegas-injection plate 421, the chamber frame 422, the actuator element423, the insulation frame 424 and the conductive frame 425 are stackedand positioned in the gas-guiding-component loading region 415sequentially, so that the piezoelectric actuator 42 is supported andpositioned in the gas-guiding-component loading region 415. The bottomof the gas-injection plate 421 is fixed on the plurality of positioningprotrusions 415 b of the gas-guiding-component loading region 415 forsupporting and positioning, so as to defined a clearance 4212 betweenthe suspension plate 4210 of the gas-injection plate 421 and an inneredge of the gas-guiding-component loading region 415 for gas to flowtherethrough.

Please refer to FIG. 10A. A flowing chamber 427 is formed between thegas-injection plate 421 and the bottom surface of thegas-guiding-component loading region 415. The flowing chamber 427 is influid communication with the resonance chamber 426 between the actuatorelement 423, the chamber frame 422 and the suspension plate 4210 throughthe hollow aperture 4211 of the gas-injection plate 421. Throughcontrolling the vibration frequency of the gas in the resonance chamber426 and making it close to the vibration frequency of the suspensionplate 4210, the Helmholtz resonance effect is induced between theresonance chamber 426 and the suspension plate 4210, and therebyimproves the efficiency of gas transportation.

Please refer to FIG. 10B. When the piezoelectric plate 4233 is movedaway from the bottom surface of the gas-guiding-component loading region415, the suspension plate 4210 of the gas-injection plate 421 is drivento move away from the bottom surface of the gas-guiding-componentloading region 415 by the piezoelectric plate 4233. In that, the volumeof the flowing chamber 427 is expanded rapidly, the internal pressure ofthe flowing chamber 427 is decreased to form a negative pressure, andthe gas outside the piezoelectric actuator 42 is inhaled through theclearances 4212 and enters the resonance chamber 426 through the hollowaperture 4211. Consequently, the pressure in the resonance chamber 426is increased to generate a pressure gradient. Further as shown in FIG.10C, when the suspension plate 4210 of the gas-injection plate 421 isdriven by the piezoelectric plate 4233 to move towards the bottomsurface of the gas-guiding-component loading region 415, the gas in theresonance chamber 426 is discharged out rapidly through the hollowaperture 4211, and the gas in the flowing chamber 427 is compressed. Inthat, the converged gas is quickly and massively ejected out of theflowing chamber 427 in a gas state close to an ideal gas state of theBenulli's law, and transported to the ventilation hole 415 a of thegas-guiding-component loading region 415. By repeating the above actionsshown in FIG. 10B and FIG. 10C, the piezoelectric plate 4233 is drivento generate the bending deformation in a reciprocating manner Accordingto the principle of inertia, the gas pressure inside the resonancechamber 426 after exhausting is lower than the equilibrium gas pressureoutside, and the gas is introduced into the resonance chamber 426 again.Moreover, the vibration frequency of the gas in the resonance chamber426 is controlled to be close to the vibration frequency of thepiezoelectric plate 4233, so as to generate the Helmholtz resonanceeffect and to achieve the gas transportation at high speed and in largequantities.

Furthermore, as shown in FIG. 11A, the gas is inhaled through the inletopening 461 a of the outer cover 46, flows into the gas-inlet groove 414of the base 41 through the gas-inlet 414 a, and is transported to theposition of the particulate sensor 45. Further as shown in FIG. 11B, thepiezoelectric actuator 42 is enabled continuously to inhale the gas inthe gas-inlet path, so as to facilitate the gas to be introduced andtransported above the particulate sensor 45 rapidly and stably. At thistime, a projecting light beam emitted from the laser component 44 passesthrough the transparent window 414 b to irritate the suspended particlescontained in the gas flowing above the particulate sensor 45 in thegas-inlet groove 414. When the suspended particles contained in the gasare irradiated to generate scattered light spots, the scattered lightspots are detected and calculated by the particulate sensor 45 forobtaining related information in regard to the sizes and theconcentration of the suspended particles contained in the gas.Furthermore, the gas above the particle sensor 45 is continuously drivenand transported by the piezoelectric actuator 42, flowing into theventilation hole 415 a of the gas-guiding-component loading region 415,and transported to the first section 416 b of the gas-outlet groove 416.As shown in FIG. 11C, after the gas flows into the first section 416 bof the gas-outlet groove 416, the gas is continuously transported intothe first section 416 b by the piezoelectric actuator 42, and the gas inthe first section 416 b is pushed to the second section 416 c. Finally,the gas is discharged out through the gas-outlet 416 a and the outletopening 461 b.

As shown in FIG. 12, the base 41 further includes a light trappingregion 417. The light trapping region 417 is hollowed out from the firstsurface 411 to the second surface 412 and spatially corresponding to thelaser loading region 413. In the embodiment, the light trapping region417 is corresponding to the transparent window 414 b so that the lightbeam emitted by the laser component 44 is projected into the lighttrapping region 417. The light trapping region 417 includes a lighttrapping structure 417 a having an oblique cone surface. The lighttrapping structure 417 a is spatially corresponding to the light beampath emitted from the laser component 44. In addition, the projectinglight beam emitted from the laser component 44 is reflected into thelight trapping region 417 through the oblique cone surface of the lighttrapping structure 417 a. It prevents the projecting light beam frombeing reflected to the position of the particulate sensor 45. In theembodiment, a light trapping distance D is maintained between thetransparent window 414 b and a position where the light trappingstructure 417 a receives the projecting light beam. Preferably but notexclusively, the light trapping distance D is greater than 3 mm. Whenthe light trapping distance D is less than 3 mm, the projecting lightbeam projected on the light trapping structure 417 a could be easilyreflected back to the position of the particulate sensor 45 directly dueto excessive stray light generated after reflection, and resulted indistortion of detection accuracy.

Please refer to FIG. 5C and FIG. 12. The gas detection main part 4 b ofthe gas detection module 4 in the present disclosure can not only detectthe suspended particles in the gas, but also detect the characteristicsof the introduced gas. Preferably but not exclusively, the gas can bedetected is at least one selected from the group consisting offormaldehyde, ammonia, carbon monoxide, carbon dioxide, oxygen, ozoneand a combination thereof. In the embodiment, the gas detection mainpart 4 b of the gas detection module 4 further includes a firstvolatile-organic-compound sensor 47 a. The firstvolatile-organic-compound sensor 47 a is positioned and disposed on thedriving circuit board 43, electrically connected to the driving circuitboard 43, and accommodated in the gas-outlet groove 416, so as to detectthe gas flowing through the gas-outlet path of the gas-outlet groove416. Thus, the concentration or the characteristics of volatile organiccompounds contained in the gas in the gas-outlet path is detected.Alternatively, in an embodiment, the gas detection main part 4 b of thegas detection module 4 further includes a secondvolatile-organic-compound sensor 47 b. The secondvolatile-organic-compound sensor 47 b is positioned and disposed on thedriving circuit board 43, and electrically connected to the drivingcircuit board 43. In the embodiment, the secondvolatile-organic-compound sensor 47 b is accommodated in the lighttrapping region 417. Thus, the concentration or the characteristics ofvolatile organic compounds contained in the gas flowing through thegas-inlet path of the gas-inlet groove 414 and transported into thelight trapping region 417 through the transparent window 414 b isdetected.

According to the above description, the miniature gas detection andpurification device based on the gas detection datum detected by the gasdetection main part 4 b of the gas detection module 4 of the presentdisclosure is provided. The microprocessor 4 c receiving the gasdetection datum to calculate, process and control the enablement and adisablement of the gas guider 3 for purifying the gas, and thecommunicator 4 d receiving the gas detection datum from themicroprocessor 4 c and externally transmitting the gas detection datumto the external device 6, so as to allow the external device 6 to obtainan information and an alarm indication in regard to the gas detectiondatum. Furthermore, through actuating the gas guider 3, the gas in theenvironment surrounding the user is inhaled through the inlet 11 andflows through the purification module 2 for filtration and purification.As a result, the effect of guiding the purified gas to an area,preferably with a volume of 50 cm×50 cm×50 cm, nearby the user isachieved, so that the user can breathe clean and purified gas. In that,the user is allowed to carry the miniature gas detection andpurification device of the present disclosure with him of the presentdisclosure, and solving the air quality problem in the environmentsurrounding the user in real time.

In summary, the present disclosure provides a miniature gas detectionand purification device for a user to carry with him. The miniature gasdetection and purification device includes a main body, a purificationmodule, a gas guider and a gas detection module. The gas detectionmodule detects gas in the environment surrounding the user to obtain agas detection datum for controlling the actuation of the gas guider.Thereby, the gas in the environment surrounding the user is inhaled intothe main body and flows through the purification module for filtrationand purification. Finally, the effect of guiding the purified gas to anarea nearby the user is achieved. It is helpful of solving the airquality problem of the user's surrounding environment in real time. Thepresent disclosure fulfills the requirements of industrial applicabilityand inventive steps.

While the invention has been described in terms of what is presentlyconsidered to be the most practical and preferred embodiments, it is tobe understood that the invention needs not be limited to the disclosedembodiment. On the contrary, it is intended to cover variousmodifications and similar arrangements included within the spirit andscope of the appended claims which are to be accorded with the broadestinterpretation so as to encompass all such modifications and similarstructures.

What is claimed is:
 1. A miniature gas detection and purificationdevice, comprising: a main body for a user to carry with him, comprisingat least one inlet, at least one outlet, a detecting inlet, a detectingoutlet and a gas-flow channel, wherein the gas-flow channel is disposedbetween the at least one inlet and the at least one outlet; apurification module disposed in the gas-flow channel of the main body; agas guider disposed in the gas-flow channel of the main body and locatedat a side of the purification module, wherein gas is inhaled by the gasguider through the at least one inlet, flows through the purificationmodule for filtration and purification, and is discharged out throughthe at least one outlet; a gas detection module disposed in the mainbody, spatially corresponding to the detecting inlet and the detectingoutlet for detecting the gas to obtain a gas detection datum, andcomprising a gas detection main part, a microprocessor and acommunicator, wherein the gas detection main part detects the gasintroduced from the outside of the main body to obtain the gas detectiondatum, the microprocessor receives the gas detection datum to calculate,process and control the enablement and disablement of the gas guider,and the communicator receives the gas detection datum from themicroprocessor; wherein the microprocessor controls operations theenablement of the gas guider according to the gas detection datumdetected by the gas detection module, so that the gas is inhaled throughthe detecting inlet and flows through the purification module forfiltration and purification, and the gas purified is guided to an areanearby the user.
 2. The miniature gas detection and purification deviceaccording to claim 1, wherein the purification module is a filter unitcomprising a filter screen, and the gas introduced is filtered andpurified through the filter screen.
 3. The miniature gas detection andpurification device according to claim 2, wherein the filter screen isone selected from the group consisting of an electrostatic filterscreen, an activated carbon filter screen and a high efficiencyparticulate air filter screen.
 4. The miniature gas detection andpurification device according to claim 2, wherein the filter screen iscoated with a cleansing factor containing chlorine dioxide to inhibitviruses and bacteria in the gas.
 5. The miniature gas detection andpurification device according to claim 2, wherein the filter screen iscoated with a herbal protective layer extracted from ginkgo and Japaneserhus chinensis to form a herbal protective anti-allergic filter.
 6. Theminiature gas detection and purification device according to claim 2,wherein the filter screen is coated with a silver ion to inhibit virusesand bacteria in the gas.
 7. The miniature gas detection and purificationdevice according to claim 1, wherein the purification module is aphoto-catalyst unit comprising a photo-catalyst and an ultraviolet lamp,and the photo-catalyst is irradiated with the ultraviolet lamp todecompose the gas introduced, so as to purify the gas.
 8. The miniaturegas detection and purification device according to claim 1, wherein thepurification module is a photo-plasma unit comprising a nanometerirradiation tube, wherein the gas is irradiated by the nanometerirradiation tube to decompose volatile organic gases contained therein,so as to purify the gas.
 9. The miniature gas detection and purificationdevice according to claim 1, wherein the purification module is anegative ionizer comprising at least one electrode wire, at least onedust collecting plate and a boost power supply, wherein when a highvoltage is discharged through the electrode wire, particles contained inthe gas introduced are attached to the dust collecting plate, so as topurify the gas.
 10. The miniature gas detection and purification deviceaccording to claim 1, wherein the purification module is a plasma ionunit comprising an upper electric-field protection screen, a highefficiency particulate air filter screen, a high-voltage dischargeelectrode, a lower electric-field protection screen and a boost powersupply device, wherein the boot power supply device provides a highvoltage to the high-voltage discharge electrode to discharge and form ahigh-voltage plasma column with plasma ion, thereby viruses or bacteriacontained in the gas introduced are decomposed by the plasma ion. 11.The miniature gas detection and purification device according to claim1, wherein the gas guider is an actuating pump, and the actuating pumpcomprises: a gas inlet plate having at least one gas inlet aperture, atleast one convergence channel and a convergence chamber, wherein the atleast one gas inlet aperture is disposed to inhale the gas, the at leastone gas inlet aperture correspondingly penetrates through the gas inletplate and in fluid communication with the at least one convergencechannel, and the at least one convergence channel is converged into theconvergence chamber, so that the gas inhaled through the at least onegas inlet aperture is converged into the convergence chamber; aresonance plate disposed on the gas inlet plate and having a centralaperture, a movable part and a fixed part, wherein the central apertureis disposed at a center of the resonance plate, and corresponds to thecenter of the convergence chamber of the gas inlet plate, the movablepart surrounds the central aperture and corresponds to the convergencechamber, and the fixed part surrounds the movable part and is fixedlyattached on the gas inlet plate; and a piezoelectric actuatorcorrespondingly disposed on the resonance plate; wherein a chamber spaceis formed between the resonance plate and the piezoelectric actuator, sothat when the piezoelectric actuator is driven, the gas introduced fromthe at least one gas inlet aperture of the gas inlet plate is convergedto the convergence chamber through the at least one convergence channel,and flows through the central aperture of the resonance plate so as toproduce a resonance by the movable part of the resonance plate and thepiezoelectric actuator to transport the gas.
 12. The miniature gasdetection and purification device according to claim 11, wherein thepiezoelectric actuator comprises: a suspension plate being square-shapedand being permitted to undergo a bending vibration; an outer framesurrounding the suspension plate; at least one bracket connected betweenthe suspension plate and the outer frame, so as to provide an elasticsupport for the suspension plate; and a piezoelectric element having aside, wherein a length of the side of the piezoelectric element is lessthan or equal to that of the suspension plate, and the piezoelectricelement is attached on a surface of the suspension plate, wherein when avoltage is applied to the piezoelectric element, the suspension plate isdriven to undergo the bending vibration.
 13. The miniature gas detectionand purification device according to claim 11, wherein the piezoelectricactuator comprises: a suspension plate being square-shaped and beingpermitted to undergo a bending vibration; an outer frame surrounding thesuspension plate; at least one bracket connected and formed between thesuspension plate and the outer frame, so as to provide an elasticsupport for the suspension plate, wherein a surface of the suspensionplate and a surface of the outer frame are non-coplanar, and a chamberspace is formed between a surface of the suspension plate and theresonance plate; and a piezoelectric element having a side, wherein alength of the side of the piezoelectric element is less than or equal tothat of the suspension plate, and the piezoelectric element is attachedon a surface of the suspension plate, wherein when a voltage is appliedto the piezoelectric element, the suspension plate is driven to undergothe bending vibration.
 14. The miniature gas detection and purificationdevice according to claim 1, wherein the gas detection main partcomprises: a base comprising: a first surface; a second surface oppositeto the first surface; a laser loading region hollowed out from the firstsurface to the second surface; a gas-inlet groove recessed from thesecond surface and disposed adjacent to the laser loading region,wherein the gas-inlet groove comprises a gas-inlet and two lateralwalls, the gas-inlet is in fluid communication with an environmentoutside the base, and a transparent window is opened on the two lateralwalls and is in fluid communication with the laser loading region; agas-guiding-component loading region recessed from the second surfaceand in fluid communication with the gas-inlet groove, wherein aventilation hole penetrates a bottom surface of thegas-guiding-component loading region, and the gas-guiding-componentloading region has a plurality of positioning protrusions disposed atthe corners thereof; and a gas-outlet groove recessed from the firstsurface, spatially corresponding to the bottom surface of thegas-guiding-component loading region, and hollowed out from the firstsurface to the second surface in a region where the first surface is notaligned with the gas-guiding-component loading region, wherein thegas-outlet groove is in fluid communication with the ventilation hole,and a gas-outlet is disposed in the gas-outlet groove and in fluidcommunication with the environment outside the base; a piezoelectricactuator accommodated in the gas-guiding-component loading region; adriving circuit board covered and attached to the second surface of thebase; a laser component positioned and disposed on and electricallyconnected to the driving circuit board, and accommodated in the laserloading region, wherein a light beam path emitted from the lasercomponent passes through the transparent window and extends in adirection perpendicular to the gas-inlet groove; a particulate sensorpositioned and disposed on and electrically connected to the drivingcircuit board, and disposed at a position where the gas-inlet grooveperpendicularly intersects with the light beam path of the lasercomponent, so that suspended particles passing through the gas-inletgroove and irradiated by a projecting light beam emitted from the lasercomponent are detected; and an outer cover covering the first surface ofthe base and comprising a side plate, wherein the side plate has aninlet opening spatially corresponding to the gas-inlet and an outletopening spatially corresponding to the gas-outlet, respectively, whereinthe first surface of the base is covered with the outer cover, and thesecond surface of the base is covered with the driving circuit board, sothat a gas-inlet path is defined by the gas-inlet groove, and agas-outlet path is defined by the gas-outlet groove, wherein the gas isinhaled from the environment outside the base by the piezoelectricactuator, transported into the gas-inlet path defined by the gas-inletgroove through the inlet opening, and passes through the particulatesensor to detect the concentration of the suspended particles containedin the gas, and the gas transported through the piezoelectric actuatoris transported out of the gas-outlet path defined by the gas-outletgroove through the ventilation hole and then discharged through theoutlet opening; wherein the base comprises a light trapping regionhollowed out from the first surface to the second surface and spatiallycorresponding to the laser loading region, wherein the light trappingregion comprises a light trapping structure having an oblique conesurface and spatially corresponding to the light beam path, wherein alight trapping distance is maintained between the transparent window anda position where the light trapping structure receives the projectinglight beam.
 15. The miniature gas detection and purification deviceaccording to claim 14, wherein the piezoelectric actuator comprises: agas-injection plate comprising a suspension plate and a hollow aperture,wherein the suspension plate is permitted to undergo a bendingdeformation, and the hollow aperture is formed at a center of thesuspension plate; a chamber frame stacked on the suspension plate; anactuator element stacked on the chamber frame for being driven inresponse to an applied voltage to undergo the bending deformation in areciprocating manner; an insulation frame stacked on the actuatorelement; and a conductive frame stacked on the insulation frame, whereinthe gas-injection plate is supported and positioned on the plurality ofpositioning protrusions of the gas-guiding-component loading region soas to define a clearance between the gas-injection plate and an inneredge of the gas-guiding-component loading region clearance for gas toflow therethrough, a flowing chamber is formed between the gas-injectionplate and the bottom surface of the gas-guiding-component loadingregion, a resonance chamber is formed between the actuator element, thechamber frame and the suspension plate, wherein when the actuatorelement is enabled and the gas-injection plate is driven to move inresonance state, the suspension plate of the gas-injection plate isdriven to generate the bending deformation in a reciprocating manner,and the gas is inhaled through the clearance, flowing into anddischarged out of the flowing chamber, so as to achieve gastransportation.
 16. The miniature gas detection and purification deviceaccording to claim 1, wherein the main body has a length ranged from 75mm to 110 mm, a width ranged from 50 mm to 70 mm and a height rangedfrom 18 mm to 32 mm.
 17. The miniature gas detection and purificationdevice according to claim 1, wherein the main body has a length rangedfrom 85 mm to 95 mm, a width ranged from 55 mm to 65 mm and a heightranged from 21 mm to 29 mm.
 18. The miniature gas detection andpurification device according to claim 1, wherein the main body has alength of 90 mm, a width of 60 mm and a height of 25 mm.
 19. Theminiature gas detection and purification device according to claim 1,wherein the main body has a weight less than or equal to 300 g.
 20. Theminiature gas detection and purification device according to claim 1,wherein the main body has a weight ranged from 150 g to 300 g.
 21. Theminiature gas detection and purification device according to claim 1,wherein the main body has a weight ranged from 100 g to 200 g.
 22. Theminiature gas detection and purification device according to claim 1,wherein the area nearby the user has a volume of 50 cm×50 cm×50 cm.